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Comment Re:Wait (Score 3, Interesting) 258

Well....let's change that to something that is physically possible.

If you were travelling 99.99% the speed of light in one direction, and something else, say 1 light year away, was travelling in the opposite direction at 99.99% the speed of light. From YOUR perspective in the first ship, the light from the other ship would take....wait for it.....1 year.

Spacetime stretches and squishes based on your speed. That's WHY time dilation occurs.

Comment Re:Some thoughts. (Score 1) 271

Only in direct line-of-sight, but technically...yes. One cell phone WILL cast a "shadow" for any directly behind it, just by the fact that this first phone's antenna is intercepting the signal. The cell tower is still putting out the same amount of signal power, however.

Comment Re:Some thoughts. (Score 0) 271

One small correction: The cell tower transmits the same signal power level, no matter where it goes or how it's used. So if a cell tower out in the Mojave desert puts out, say, 5 kilowatts and there's no cell phone around to receive its signal, then....the cell tower put out 5 kilowatt. Phones that recharge from the cell towers' transmission won't effect anyone else's phone reception.

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